As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EWR - CAPTAIN REPORTED SLAT DISAGREE LIGHT REMAINING ILLUMINATED AFTER SLAT RETRACTION. EMERGENCY DECLARED RETURNED EWR LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED DIRECT FLIGHT GUIDANCE COMPUTER NUMBER 2 THAT WAS AT FAULT. SYSTEM GROUND CHECKED NORMAL OPERATION.